As part of the run of Sophia Bolles' adaptation of the German Expressionist classic “The Cabinet of Dr. Caligari,” the folks at the Overtime Theater are offering a silent film series. “Metropolis” (above), Fritz Lang's 1927 film, is being screened tonight; “Waxworks” on Friday; and “Nosferatu” on Saturday. Films start roughly 10 minutes after “Caligari,” which is about an hour long and starts at 8 p.m. today-Saturday. Admission to the films is free with a ticket to the play, which costs from $10 to $14. The rest of the series holds the original “Caligari” Feb. 16; another go-round for “Metropolis” on Feb. 14; “Student of Prague” on Feb. 8 and “Golem” on Feb. 9. The theater is at 1203 Camden St. Call 210-557-7562 or visit theovertimetheater.org for more information.